Richard S. Williamson, American lawyer and diplomat, 17th Assistant Secretary of State for International Organization Affairs (d. 2013)
Richard Salisbury Williamson (May 9, 1949 – December 8, 2013) was an American lawyer, diplomat and political advisor. He previously served as Special Envoy to Sudan under George W. Bush. Williamson was a partner at Winston & Strawn and was also Thomas J. Sharkey Distinguished Visiting Scholar at Seton Hall's Whitehead School of Diplomacy.